Improvement in tack-driving machines for boots and shoes



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HENRY G. THOMPSON AND CHARLES LUKE, OF MILFORD, CONNECTICUT; SAID LUKEASSIGNOB TO SAID THOMPSON.

IMPROVEMENT IN TACK-DRIVING MACHINES FOR BOOTS AND SHOES.

Specification forming part of Letters Patent No. 159,474, dated February2, 1876; application filed January 18, 1875.

To all whom it may concern.-

Be it known that we, HENRY G. THOMPSON and CHARLES LUKE, of Milford,county of New Haven and State of Connecticut, have invented certain newand useful Improvements in Tack-Driving Machines for Boots and Shoes, ofwhich the following is a specification:

Our invention relates to that class of tackdriving machines in which isemployed a reciprocating revolving cylinder having a stationary head andan inclined roadway for the passage of the tacks; and it consists inarresting the downward movement, of the tacks in a continuous straightroadway, and separating each singly by means of apush bar for trappingand moving, and a separator for stopping; also, in a guard on theinsideof the stationary cylinder-head, immediately above the roadway; and,further, in constructing the roadway larger at the bottom than at thetop, with the bottom thereof closed, and with a continuous openingextending through the stationary head of the cylinder, all ashereinafter more fully set forth.

In the accompanying drawing forming part of this specification, Figurelis a longitudinal section of the incline and stationary cylinderheadembodying my invention. Fig. 2 is a cross-section of the incline withinthe cylinder. Fig. 3 is a longitudinal section through the separator andpush-bar, and Fig. 4 is a detached view of the same.

A represents the stationary front head of a revolving reciprocatingfeedingcylinder, with the incline B passing through the same, saidincline being formed with the roadway a for the tacks. In the incline B,a suitable distance above the lower end, is inserted a 1011-gitudiually-flanged cross-bar, C, in which the roadway ais continuedstraight down. Between. the flanges on this bar is placed alaterally-slidin g push-bar, D, provided on its under side with a trap,12, and a separator or separating-bar, cl, which latter passes through aslot in the incline across the roadway. All the tacks in the roadway areheld in check by the separator 11 pressing upon their tails until thepush-bar C begins to move, and when the push-bar has moved sufficientlyto disengage the separator from the tails of the tacks one CASE B.

of them is immediately discharged, and all the others in the roadway areheld in check by the push-bar acting upon the heads of the tacks, untilthe return movement of the pushbar, when a tack is instantly droppedinto the trap b, and held ready for discharge upon a repetition of themovement of the parts. Attached to the inside of the stationarycylinder-head A, immediately above the roadway, is a guard, h, soconstructed as to admit of the tail of a tack lying on the roadwaybeneath the guard, with its head held in check by means thereof, so thatwhen the reciprocating brush E moves it will dislodge the same, which itwill not do when the tail is held by the sides of the outletin thecylinder head. The roadway a is constructed tapering in itscross-section, as shown in Fig. 2-5. 6., broadest at the lower part. Thebottom is closed, thus forming a continuous opening, 41, extendingthrough the stationary cylinderhcad A, for the purpose of removing allheadless tacks, slugs, and other matter which may drop through theroadway.

Having thus fully described our invention, what we claim as new, anddesire to secure by Letters Patent, is-

1. In a tack-driving machine, a continuous straight roadway extendingthrough the head of the cylinder, provided with apush-bar and separator,all arranged to arrest the down- Ward movement of tacks and separatethem, so that each may be moved forward singly.

2. A guard attached to the inside of the stationary cylindenheadimmediately above the roadway, as shown, for the purposes herein setforth.

3. The roadway at, extending through the stationary cylinderhead,provided with a continuous longitudinal slot, wider below than at thetop, and closed at the bottom, substantially as and for the purposedescribed.

In testimony that we claim the foregoing as our invention we hereuntoaffix our signatures this 11th day of January, 1875.

HENRY Cr. THOMPSON. CHARLES LUKE.

'1 OFFICE.

